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Stainless Steel   |   General Information

EN Standards for Stainless Steel Bar


The old BS970 Parts 1 & 3: 1991 standards have been replaced by a number of EN Standards, the most important of which are shown below

EN10088-3 Replaces BS970 Part 1: 1991 & BS970 Part 3: 1991 covering chemical composition & mechanical properties

EN10058 Tolerances for Hot Rolled Flat Bars

EN10059 Tolerances for Hot Rolled Square Bars

EN10060 Tolerances for Hot Rolled Round Bars

EN10061 Tolerances for Hot Rolled Hexagonal Bars

EN10278 Tolerances for Bright Bars (Drawn, Turned or Ground)

ISO186 Parts 1 & 2 Tolerance Classifications
(see page 4)
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Diameter - Smooth Turned

(These are H10 tolerances, which are 'all minus' tolerances )

Diameter (mm) Tolerance (mm)
18 to 30 +0 / -0.084
31 to 50 +0 / -0.100
51 to 79 +0 / -0.120

Diameter - Rough Turned

(These are 'all plus' tolerances)

Diameter (mm) Tolerance (mm)
75 to 150 -0 / +1.5
151 to 225 -0 / +2.0
226 to 410 -0 / +3.0

Diameter - Bright Drawn

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Note

These are H9 Tolerances
H9 Tolerances are 'all minus' tolerances:

+0mm / - Figure in table

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Diameter (mm) Tolerance (mm)
6 to 10 +0 / -0.036
11 to 18 +0 / -0.043
19 to 30 +0 / -0.052

Width & Thickess - Hot Rolled Square

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Size (mm) Tolerance (mm) + or -
75 to 150 1.5
151 to 225 2.0
226 to 410 3.0

Thickness - Hot Rolled Flat

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.

Size (mm) Tolerance (mm) + or -
Up to 20 0.5
20 to 40 1.0
40 to 80 1.5

Width - Hot Rolled Flat

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.

Size (mm) Tolerance (mm) + or -
10 to 40 0.75
40 to 80 1.0
80 to 100 1.5
100 to 120 2.0
120 to 150 2.5

Angle Bars - Leg Length

Leg (mm) Leg Length Tol (mm) + or - Thickness (mm) + or -
20 1.5 0.4
25 1.5 0.5
30 2.0 0.5
40 & 50 2.0 0.6
60, 70, 75, 80, 90, 100 3.0 0.75

Angle Bars - Internal Radius

Leg (mm) Max Internal Radius (mm)
20, 25, 30 4
40 5
50, 60 7
65, 70, 75, 80 9
90, 100 10

ISO 286 Tolerances in mm

EXAMPLES:

H = All Minus Tolerance  e.g. 45mm dia. H9 = +0 / -0.062

J = Tolerance Divided  e.g. 45mm dia. J9 = +/- 0.031

K = All Plus Tolerance e.g. 45mm dia. K9 = +0.062/ -0

( The K tolerance is usually only applied to larger diameter bars - over 75mm

 

H8 = Precision Ground

H9 = Bright Drawn

H10 = Smooth Turned

 

In the following table:

TOLERANCE IN mm FOR GIVEN TOLERANCE NUMBER

Diameter (mm) 6 7 8 9 10 11 12 13
>1 to 3 inc. 0.007 0.009 0.014 0.025 0.040 0.060 0.090 0.140
>3 to 6 inc. 0.008 0.012 0.018 0.030 0.048 0.075 0.120 0.180
>6 to 10 inc. 0.009 0.015 0.022 0.036 0.058 0.090 0.150 0.220
>10 to 18 inc. 0.011 0.018 0.027 0.043 0.070 0.110 0.180 0.270
>18 to 30 inc. 0.013 0.021 0.033 0.052 0.084 0.130 0.210 0.330
>30 to 50 inc. 0.016 0.025 0.039 0.062 0.100 0.160 0.250 0.390
>50 to 80 inc. 0.019 - 0.046 0.074 0.120 0.190 0.300 0.460
>80 to 120 inc. 0.022 - - 0.087 0.140 0.220 0.350 0.540
>120 to 180 inc. 0.025 - - 0.100 0.160 0.250 0.400 0.630
>180 to 250 inc. - - - 0.115 0.185 0.290 0.460 0.720
>250 to 315 inc. - - - - - 0.320 0.520 0.810
>315 to 400 inc. - - - - - 0.360 0.570 0.890
>400 to 500 inc. - - - - - 0.400 0.630 0.970
> 500 - - - - - 0.440 0.700 1.100

Straightness Tolerances for Bright Bars

Taken from BS EN 10278:1999, applicable to Bright Bars only.

 

Method of measuring deviation - Preferred Method B.1 from BS EN 10278:

1. The bar shall be supported on a suitable surface so as to eliminate or minimise sagging.

2. A 1 metre long straight edge shall be placed on the surface of the bar at any position along it's length.  No part of the straight edge shall be within 150mm of the ends of the bar.

3. Straightness shall be determined by measuring the gap between the bar and the straight edge by suitable means such as a feeler guage.

 

The following table indicates:

DEVIATION FROM STRAIGHTNESS

Product Dimension Max Deviation in mm within a 1mtr length measured at least 150mm from either end of bar
Round 1.0mm
Square & Hexagon < or = 75mm 1.0mm
Square & Hexagon > 75mm 1.5mm
Flat Width < 120mm On Width: 1.5mm
Flat Width < 120mm On Thickness: 2.0mm
Flat Width > or = 120mm On Width: 2.0mm
Flat Width/Thickness < 10.1 On Thickness: 2.5mm
Flat Width > or = 120mm On Width: 2.5mm
Flat Width/Thickness > or = 10.1 On Thickness: 3.0mm

Stainless Steel Grades

The following Table lists:

 

Stainless Steel Grades, Compositions & Typical Mechanical Properties

 

Mechanical Properties apply to Rolled Products

EN BS AISI EN No. Comp Comp Comp Comp Comp Mech Mech Mech
Obsolete C Cr Ni Mo Other Proof 0.2%Nmm Tensile Nmm Elong %
1.4000 403S17 410S - 0.08x 12 - - - 20-250 400-600 19
1.4002 405S17 405 - 0.08x 12 - - 0.2 Al 210-250 400-600 17
1.4003 - - - 0.03x 11 0.5 - - 250-320 450-650 18-20
1.4016 430S17 430 60 0.08x 17 - - - 240-280 430-630 18-20
1.4113 434S17 434 - 0.08x 17 - 1 - 260-280 450-630 18
1.4509 - - - 0.015x 18 - - Nb, Ti - - -
1.4510 - 430Ti - 0.05x 17 - - 0.6 Ti 230-240 420-600 23
1.4511 - 430Nb - 0.05x 17 - - 0.6 Nb 230-240 420-600 23
1.4512 409S19 409 - 0.03x 11 - - 0.5 Ti 210-220 380-560 25
1.4521 - (444) - 0.025x 17 - 2 0.6 Ti - - -
1.4006 410S21 410 56A .08-.15 12 - - - 400-450 550-850 12-20
1.4005 416S21 416 56AM .08-0.15 12 - - .35xS 450 650-850 12
1.4021 420S29 420 56B .16-.25 12 - - - 450-550 650-950 10-15
1.4028 420S45 420 56D .26-.35 12 - - - 600 740-1000 10-15
1.4029 416S37 416 56CM .25-.32 12 - - .35xS - - -
1.4057 431S29 431 57 .12-.22 15 2 - - - - -
1.4104 416S29 416 56BM .10-.17 16 - 0.4 .35xS 500 650-850 10
1.4112 - 440B - .85-.95 17 - 1.0 0.1V - 900max 12
1.4125 - 440C - .95-1.2 17 - 0.6 - - 900max 12
1.4594 460S52 - - 0.7x 14 5 1.5 1.5 Cu 700-1000 930-1270 10
1.4749 - 446 - .15-.20 26 - - 0.2N - - -
1.4301 304S31 304 58E 0.07x 18 8 - - 210-260 520-750 45
1.4303 305S19 305 - 0.06x 18 11 - - 200-250 500-650 45
1.4305 303S31 303 58M 0.10x 18 8 - 0.35xS 190-230 500-700 35
1.4306 - 304L - 0.030x 18 10 - - 200-250 500-670 45
1.4307 304S11 304L - 0.030x 18 8 - - 200-250 500-670 45
1.4310 301S21 301 - 0.05/0.1 17 6 - - 250-280 600-950 40
1.4311 304S61 304LN - 0.030x 18 9 - 0.22xN 270-320 550-750 40
1.4372 - 201 - 0.15x 17 4.5 - 6.5Mn 330-380 750-950 40

Stainless Steel Grades - Cont'd

The following Table lists:

 

Stainless Steel Grades, Compositions & Typical Mechanical Properties

 

Mechanical Properties apply to Rolled Products

EN BS AISI EN No Comp Comp Comp Comp Comp Mech Mech Mech
Obsolete C Cr Ni Mo Other Proof 0.2% Nmm Tensile Nmm Elong %
1.4401 316S31 316 58J 0.07x 17 11 2 - 220-270 520-680 40
1.4404 316S11 316L - 0.030x 17 11 2 - 220-270 520-680 40
1.4406 316S61 316LN - 0.030x 17 11 2 0.22xN 280-330 580-780 40
1.4432 316S13 316L - 0.030x 17 11 2.5 - 220-270 520-700 40
1.4435 316S13 316L - 0.030x 17 13 2.5 - 220-270 520-700 40
1.4436 316S33 316 58J 0.05 17 11 2.5 - 220-270 500-730 40
1.4438 317S12 317L - 0.030x 18 13 3 - 220-270 520-720 35
1.4439 - - - 0.030x 17 13 4 0.22xN 270-320 580-780 35
1.4541 321S31 321 58B 0.08x 18 9 - 0.5Ti 200-250 500-720 40
1.4550 347S31 347 58F 0.08x 18 9 - 0.5Nb 200-250 500-720 40
1.4571 320S31 (316Ti) - 0.08x 17 11 2 0.5Ti 220-270 520-690 40
1.4539 904S13 - - 0.020x 19 24 4 2xCu 220-270 520-730 35
1.4547 - - - 0.020x 20 18 6 1xCu 300-350 650-850 35
1.4833 309S16 309 - 0.15x 22 12 - -
1.4845 310S24 310 - 0.10x 25 20 - -
1.4878 321S51 321H - 0.10x 18 9 - 0.6TI

Tolerances

~ The ISO tolerances shown are taken from ISO 286.

 

~ All other tolerances shown in this document are  based upon the relevant part's of the applicable EN Standard's.

 

~ For tolerances on Rolled Edge Flat Bar please refer to separate Datasheet

 



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This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

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